IDE knowledge anyone?
lehmann at ans-netz.de
Sun Dec 6 15:14:39 CST 2015
Jon Elson <elson at pico-systems.com> wrote:
> On 12/06/2015 02:57 PM, Oliver Lehmann wrote:
>> I've built a Harddisk-Controller-Emulator for my system which accesses
>> a IDE (PATA) harddisk with an ATMega in PIO mode. It works like a charm
>> except for one WD harddisk. The harddisk itself works fine with MS-DOS
>> 6.22 and FreeBSD but refuses to work with my ATMega.
>> On reading or writing a sector, right after the command is issued, the
>> error bit is set in the status register, and the error register indicates
>> an ABRT.
> I don't have any specific knowledge of this, but it has to be a
> timing problem.
> Something about the timing of the command signals is just different
> enough that the drive thinks this is wrong. Sorry I can't give more
> specific help.
Thought the same and added some 400ns sleeps between each of the cylinder,
sector, head commands and before I executed the read command... without
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